// 设置变量
@bg-color:#b7d4a8;
*{
    margin:0;
    padding:0;
    box-sizing: border-box;
}
body{
    font: bold 20px "Courier";
}
.main{
    display: flex;
    flex-flow: column;
    align-items: center;
    justify-content: space-around;
    width: 360px;
    height: 420px;
    background-color:@bg-color;
    margin: 100px auto;
    border: 10px solid black;
    border-radius: 20px;
    //游戏舞台
    #stage{
        //相对定位
        position: relative;
        width: 304px;
        height: 304px;
        border: 2px solid black;
        //设置蛇的样式
        #snake>div{
            width: 10px;
            height: 10px;
            background-color: #000;
            border: 1px solid @bg-color;
            //开启绝对定位
            position: absolute;
        }
        #food{
            display: flex;
            flex-flow: row wrap;
            justify-content: space-between;
            align-content:space-between ;
            width: 10px;
            height: 10px;
            position: absolute;
            left: 40px;
            top: 100px;
            div{
                width: 4px;
                height: 4px;
                background-color: #000;
                transform: rotate(45deg);
            }
        }
    }
    //计分板
    #score-panel{
        width: 300px;
        display: flex;
        justify-content:space-between ;
    }
}